Filtering-machine.



R. T. WILDER.

FILTEEING MACHINE.

APPLICATION FILED JUNE 16, 190B.

Patented June 22, 1909.

A TTORNE Y8 I To all (whom it may concern:

UNITED STATES PATENT OFFICE.

RICHARDSON TIMOTHY WILDER, or EL Peso, TEXAS.

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Be it known that I, RICHARDSON T. WIL- DER, acitizen of the United States, and a resident of El Paso, in the county of El Paso and State of Texas, have invented a new and Im roved Filtering-Machine, of which the i0 owing is a full, clear, and exact description.

This invention relates to filtering ma chines, and more particularly such as operate centrifugally to force the substance to be filtered through the filtering media.

The object of this invention is to provide machine having a rotatable casing and a he ical screw adapted to centrifu ally 'se arate the solid matter from the liqui s in w ich it is held in mechanical suspension.

Avfurther object of the invention is to provide a device of the class described, having a rotatable casing, in one end of which perforated cylinders' are arranged and into which the solution carrying the solid matter in'susension flows, and a helical screw adapted, like the casing, to be rotated at a high'rate of s eed so that the solution within the cyliners will be acted upon centrifugally, and the solid matter and the liquid separated one from another as the liquid is forced through the filtering media.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a longitudinal section on the line 11 of Fig. 2; and Fig. 2 is a cross section on the line 22 of Fig. 1.

Before proceeding to a more detailed description of -my invention, it should be understood that I provide a filtering machine,

. especially adapted to be used in connection with the cyamdprocess of gold extraction. As before mentioned, the device includes a suitably formed, rotatable casing. Near one end of the casing there are two perforated cylinders, one arranged within the other, and having a suitable filtering fabric located therebetween. Adjacent to these cylinders is an opening into which a s out extends for carrying the liquid to be ii tered. Revolubly mounted within the casing and having a helical screw arranged thereupon, is a shaft. When rotated at a high rate of speed, the

Specification of Letters Patent.

Application filed June 16, 1908.

Patented June 22, 1909.

Serial No. 438,702.

. casing and the screw centrifu ally act upon the liquid and the solution is orced through the perforated cylinders and out of the d15- charge nozzles located adjacent thereto. The sol1d matter is carried beyond the perforated cylinders in the casin and escapes throu h discharge nozzles at t e further end of the casing. The end of the shaft which liesin this portion of the casing is hollow and has an opening within the casing, forming a conduit, so that a stream of water may be passed therethrough to assist in washing the solid matter or residues into the discharge nozzles.

Referring more particularly to the drawings, 1 represents a casing, which is constricted at its center so that outwardly disosed, doubly ta ered portions 2 are formed. he casing has heads 3 and 4 respectively, the latter being removably held in place by means of bolts 5. These heads have hollow 'ournals 6 integral therewith and located in earings 7 of suitable supports or standards 8. Rigid with the journal 6 of the removable head 4 of the casing, and positioned beyond the standard 8 is a driving pulley 9, whereby the casing may be rotated. Arranged within the casing, at the o osite end to that which carries the removable head 4 are two e1- forated cylinders 10, having a strip of ii tering fabric 11, such as canvas or the like, separating one from the other. These cylinders are rigidly arranged within the casing so that they rotate therewith. A spout 12 for introducing the solution or other liquid to be filtered, has one end located in the hollow journal 6 adjacent to the cylinder. The outwardly disposed portions 2 of the casing have opposite pairs of discharge nozzles 13 at their apexes. These nozzles empty into annular troughs 14; the latter having flanges 15 adjacent to the nozzles so that the material discharged. will not be spilled. These troughs in turn open into pipes 16 located under the machine, for carrying away the material delivered from the nozzles.

Revolubly journaled on sup orts 17 and extending through the center 0 the casing is a shaft 18, on which is mounted a helical blade or screw 19. rigidly secured to the shaft at the point where it extends beyond one of the standards 17. The opposite end of the shaft from that which carries the driving pulley is hollow and has an opening 21 discharging from the hollow part 22 into the interior of the casing. A feed pipe 23 has a movable connection at the end of the shaft with the opening 22 so that a stream of liquid may be forced into the interior of the casing.

From the descri tionabove set forth, it will be understoo that the device comprises a rotatable casing adapted to be driven at a high rate of speed, together with an independentlyrotatable screw, therate of speed'at which said screw is rotated determinin the rate of discharge of the filtered material. As the casing 1 is rotated at a high rate of speed the slimes fed thereto by the spout 12 are freed of their liquid contents under the centrifugal action of the device, said liquid passing through the perforated portions 10 and filtering medium 11 intothe chamber 2, from which discharged through the nozzles 13 into the trough 14 and pipe 16 at the right hand end of the machine. The residue is carried beyond the perforated cylinders in the casing y means of the screw 19, and a stream of water is introduced through the feed pipe 23,

passage 22 and discharge opening 21 which aids in the discharge of said filtered material through the'nozzles in the left hand end of the casing 1 into the trough 14 and pipe 16 communicating therewith.

Having thus described my invention, I claim at new and desire to secure by Letters Patent 1. A filtering machine comprisin a horizontal rotatable casing perforated t rough a portion of its length, a filtering medium secured to cooperate with said perforated portion, an annular chamber surrounding said perforated portion and rovided with nozzles discharging substantially parallel to vthe axis of said casing,-an annular trough open at one side to receive the ends of said nozzles, and an independently rotatable screw for moving the residue longitudinally through said casing.

2-. A filtering machine comprising a hori zontal rotatable casing, perforated throughout a portion of its length, a filtering medium secured to cooperate with said perforated portion, an annular chamber surrounding said perforated portion and rovided with nozzles dischar ing substantia y arallel to the axis of sai casing, an annu ar trough open at one side to receive the ends of said nozzles, ai -shaft extending longitudinally through said casing and provided with a '55 passage for. conveying a liquid into the nonperforated portion of said casing, a feed screw mounted on said shaft, and means for discharging the liquid and material fed by said screw.

'mounte 3. A filtering machine, comprising a rotatable casing, (perforated for a portion only of its length an having means whereby material may be received from the outside, a filtering medium supported to cooperate with said perforated portion, the rotation of said casin operating centrifugally to ex el, the liqui contents of the material through said filtering medium, an annular chamber surrounding the perforated ortion of said casing and provided with horizontal dischar i' nozzles, a

feed screw extending longitudma 1 through" and a non-perforated portion, a' filtering me- I dium secured to cooperate with said perforated portionfan annular chamber surrounding sa1d perforated portion and having discharge nozzles, said chamber rotatin with said casing, a shaft extending ldngitu inally.

through said casing and provlded with a passage for conveying a li uid into the non-perforated ortion of said casing, a feed screw on said shaft, and means for discharging the liquid and material fed by said screw.

5. A filterin machine, comprising a horizontal rotatab e casinghaving. a perforated and a non-perforated portion, a filtering medium secured to cooperatewith said perforated portion, means for feedin slimes to said casing, the li uid contents 0 which are centrifugally expe led through said filtering In'edium, means for receiving and discharging the liquid expelled through said filtering medium, through said casing and having a passage for conveying the liquid to the non-perforated portion of said casing, a feed screw on said shaft to feed the residues from said slimes to the non-perforated portion. of said casin a shaft extending longitudinally I 

